Atmospheric River Bringing Heavy Rain to Southern California and Heavy Snow to the Sierra Nevadas

A strong atmospheric river will continue heavy rain over southern California through Friday. The heaviest rainfall is ongoing today in the Los Angeles Basin. Flash and urban flooding is possible. A prolonged heavy snowfall has begun over the Sierra Nevada Mountains and will continue through Friday. Travel will become increasingly difficult over the passes due to snow and strong winds. Read More >

Hazardous Weather Conditions

Winter Weather Advisory in effect from December 26, 04:00 AM PST until December 27, 07:00 AM PST

Current conditions at

Stampede Pass (KSMP)

Lat: 47.27648°NLon: 121.33817°WElev: 3970.0ft.

unknown precip

31°F

-1°C

Humidity	100%
Wind Speed	N 0 MPH
Barometer	29.61 in (1002.71 mb)
Dewpoint	31°F (-1°C)
Visibility	10.00 mi
Last update	25 Dec 05:56 PM PST

More Information:

Local Forecast Office More Local Wx 3 Day History Hourly Weather Forecast

Extended Forecast for

9 Miles E Snoqualmie Pass WA

Winter Weather Advisory December 26, 04:00am until December 27, 07:00am

Click here for hazard details and duration

Winter Weather Advisory

Tonight
Low: 27 °F
Chance Snow
then Slight
Chance Snow
Friday
High: 30 °F
Heavy Snow
Friday Night
Low: 20 °F
Breezy. Heavy
Snow then
Snow Likely
Saturday
High: 24 °F
Slight Chance
Snow then
Partly Sunny
Saturday Night
Low: 16 °F
Mostly Cloudy
Sunday
High: 29 °F
Partly Sunny
Sunday Night
Low: 22 °F
Mostly Cloudy
Monday
High: 33 °F
Mostly Cloudy
Monday Night
Low: 25 °F
Mostly Cloudy

Detailed Forecast

Tonight

A chance of snow before 10pm, then a slight chance of snow after 1am. Mostly cloudy, with a low around 27. South wind around 6 mph becoming east after midnight. Chance of precipitation is 50%. Total nighttime snow accumulation of less than a half inch possible.

Friday

Snow, mainly after 7am. The snow could be heavy at times. High near 30. Southeast wind 8 to 15 mph becoming west in the afternoon. Winds could gust as high as 22 mph. Chance of precipitation is 100%. New snow accumulation of 3 to 5 inches possible.

Friday Night

Snow, mainly before 4am. The snow could be heavy at times. Low around 20. Breezy, with a west wind 24 to 26 mph, with gusts as high as 33 mph. Chance of precipitation is 100%. New snow accumulation of 4 to 8 inches possible.

Saturday

A 20 percent chance of snow before 10am. Partly sunny, with a high near 24. West wind 9 to 15 mph.

Saturday Night

Mostly cloudy, with a low around 16. Light northwest wind.

Sunday

Partly sunny, with a high near 29.

Sunday Night

Mostly cloudy, with a low around 22.

Monday

Mostly cloudy, with a high near 33.

Monday Night

Mostly cloudy, with a low around 25.